Finding the Fourth Proportional to 89,356.18, 133,830.11 and 42,641.86

Step by Step Solution

1. Step 1: Write the proportion equation
   89,356.18 : 133,830.11 = 42,641.86 : x
2. Step 2: Convert to fraction form
   89,356.18/133,830.11 = 42,641.86/x
3. Step 3: Cross multiply
   89,356.18x = 133,830.11 × 42,641.86
4. Step 4: Simplify right side
   89,356.18x = 5,706,764,814.40
5. Step 5: Solve for x
   x = 5,706,764,814.40/89,356.18
6. Step 6: Final answer
   x = 63,865.36